Fissure

Fissure

In anatomy, fissure (Latin "fissura", Plural "fissurae") is a groove, natural division, deep furrow, cleft, or tear in various parts of the body.

Anatomy

Various types of anatomical fissure are:

Brain

*"Fissure of Bichat": found below the corpus callosum in the cerebellum of the brain.
*"Broca's fissure": found in the third left frontal fold of the brain.
*"Burdach's fissure": connects the brain's insula and the inner surface of the operculum.
*"Calcarine fissure": extends from the occipital of the cerebrum to the occipital fissure.
*"Callosomarginal fissure": found in the mesial surface of the cerebrum.
*"Central fissure or Ronaldo's fissure": separates the brain's frontal and parietal lobes.
*"Clevenger's fissure": found in the inferior temporal lobe of the brain
*"Collateral fissure": found in the inferior surface of the cerebrum.
*"Hippocampal fissure": a fissure that extends from the brain's corpus callosum to the tip of the temporal lobe.
*"Horizontal fissure or Transverse fissure": found between the cerebrum and the cerebellum. Transverse fissure is also found in the liver and lungs.
*"Occipitoparietal fissure": found between the occipital and parietal lobes of the brain.
*"Fissure of Sylvius": separates the frontal and parietal lobes of the brain from the temporal lobe.
*"Wernicke's fissure": separates the brain's temporal and parietal lobes from the occipital lobe.
*"Zygal fissure": found in the cerebrum.

kull

*"Auricular fissure": found in the temporal bone
*"Pterygomaxillary fissure"
*"Sphenoidal fissure": separates the wings and the body of the sphenoid bone.

Liver

*"Longitudinal fissure": found in the lower surface of the liver, also a fissure that separates the right and left hemispheres of the cerebrum.
*"Portal fissure": found in the under-surface of the liver.
*"Umbilical fissure": found in front of the liver.

Other

*"Henle's fissure": the connective tissue between the muscle fibers of the heart.
*"Palpebral fissure": separates the upper and lower eyelids.

Abnormal fissure

Fissure can also mean unnatural tract or ulcer, most commonly found in the anus. One of the most common types of fissure is anal fissure.

Other fissures

*"Fissure vent": a volcanic vent that does not include explosive activity.

ee also

* Sulcus (anatomy)


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  • fissure — [ fisyr ] n. f. • 1314, rare av. XVIIIe; lat. fissura, de fissus, p. p. de findere « fendre » ♦ Petite fente. ⇒ cassure, crevasse, scissure. Fissure d un mur, d une cloison. ⇒ lézarde. « Un encadrement que le temps avait rayé par des fissures… …   Encyclopédie Universelle

  • Fissure — Fis sure, n. [L. fissura, fr. findere, fissum, to cleave, split; akin to E. bite: cf. F. fissure.] A narrow opening, made by the parting of any substance; a cleft; as, the fissure of a rock. [1913 Webster] {Cerebral fissures} (Anat.), the furrows …   The Collaborative International Dictionary of English

  • fissure — c.1400, from O.Fr. fissure (13c.) and directly from L. fissura a cleft, from root of findere to split, cleave, from PIE *bhi n d , from root *bheid to split (Cf. Skt. bhinadmi I cleave, O.H.G. bizzan to bite, O.E. bita a piece bitten off, mo …   Etymology dictionary

  • fissure — [fish′ər] n. [ME < OFr < L fissura < fissus: see FISSION] 1. a long, narrow, deep cleft or crack 2. a dividing or breaking into parts 3. Anat. a groove between lobes or parts of an organ, as in the brain 4. Med. a break or ulceration… …   English World dictionary

  • Fissure — Fis sure, v. t. To cleave; to divide; to crack or fracture. [1913 Webster] …   The Collaborative International Dictionary of English

  • Fissure — Fissure. См. Волосная трещина. (Источник: «Металлы и сплавы. Справочник.» Под редакцией Ю.П. Солнцева; НПО Профессионал , НПО Мир и семья ; Санкт Петербург, 2003 г.) …   Словарь металлургических терминов

  • fissure — index break (fracture), force (break), part (separate), rift (gap), sever …   Law dictionary

  • fissure — Crack, cleft, crevasse, crevice, cranny, chink Analogous words: *break, gap: *breach, split, rent, rupture, rift …   New Dictionary of Synonyms

  • fissure — ► NOUN ▪ a long, narrow crack. ► VERB ▪ split; crack. ORIGIN Latin fissura, from findere to split …   English terms dictionary

  • fissure — (fi ssu r ) s. f. 1°   Petite fente, crevasse. Les fissures d un mur, d un vase, d un terrain. La lumière pénétrait par une fissure de la cloison.    Fig. •   Je sais que, malgré les barrières immenses qu on entasse sans cesse autour de moi, on… …   Dictionnaire de la Langue Française d'Émile Littré

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